To determine the number of genes determining cold resistance, the method proposed by Merezhko (1983) was used. According to the distribution of the F2 plants, it was concluded that the part of the progenies like a recessive parent averaged 25%. From this, we concluded that parental forms in the crosses differ from each other by the alleles of one gene.
Sherepitko, V. V. and Sichkar, V. I.
"Research Notes : Segregation of the F2 populations and F3 families,"
Soybean Genetics Newsletter: Vol. 14
, Article 76.
Available at: http://lib.dr.iastate.edu/soybeangenetics/vol14/iss1/76